Electronically actuated microfluidic valves with zero static-power consumption using electropermanent magnets
Electronically actuated microfluidic valves with zero static-power consumption using electropermanent magnets
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DOI：
10.1016/j.sna.2019.06.037
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发表时间：
2019-09
期刊：
影响因子：
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通讯作者：
Azam Gholizadeh;S. Abbaslou;Pengfei Xie;A. Knaian;M. Javanmard
中科院分区：
文献类型：
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作者：
Azam Gholizadeh;S. Abbaslou;Pengfei Xie;A. Knaian;M. Javanmard
阀门是必不可少的组成部分，建立集成的微流体电路，使流体运输的控制执行复杂的操作。微流体通道的电子驱动可以实现完全集成的小型化流体系统，具有超紧凑的足迹。在这里，我们提出了一种新的方法，用于电子驱动的微型微流体阀，消耗零静态功率，使用电永磁体（EPM）结合弹性膜。提出的执行器设计与标准的软光刻制造通道兼容，允许芯片上的实验室研究人员将这些阀门集成到现有的聚二甲基硅氧烷（PDMS）微流体系统中。电永磁体的使用可以实现零静态功耗（保持模式），并且每次驱动（开关/主动模式）使用的能量为毫焦耳。使用这种配置，我们演示了在具有y结的通道中按需控制流体传输。在本文中，我们使用粒子图像测速法研究和表征基于EPM的阀门的性能，并将结果与使用永磁体驱动的阀门进行比较。
Valves are essential components for building integrated microfluidic circuits and enable control of fluidic transport for performing complex operations. Electronic actuation of microfluidic channels can enable fully integrated miniaturized fluidic systems with ultra-compact footprints. Here, we present a novel method for electronically actuating miniaturized microfluidic valves that consume zero-static power, using electropermanent magnets (EPM) in conjunction with elastomeric membranes. The proposed actuator design is compatible with standard soft-lithography fabricated channels allowing lab-on-a-chip researchers to integrate these valves in their existing Polydimethylsiloxane (PDMS) microfluidic systems. The use of electropermanent magnets enables zero static power consumption (holding mode), and uses on the order of millijoules of energy per actuation (switching/active mode). Using this configuration, we demonstrate on-demand control of fluidic transport in channels with a Y-junction. In this manuscript, we study and characterize the performance of EPM based valves using particle image velocimetry and compare the results with valves actuated using permanent magnets.